I think it might have more to do with the actual content than the animation. A lot of today's trash on youtube that parents leave their kids watch unattended is

I think it might have more to do with the actual content than the animation. A lot of today's trash on youtube that parents leave their kids watch unattended is dangerous, and seems to promote ADD. Thankfully, there are still youtube channels with shows and cartoons we grew up with, so parents can show those to their kids instead of today's trash.